The following is an example of a lesson plan for explaining the absolute value problem in seventh grade mathematics:
** 1. Teaching Purpose **
Through the distance between the point on the number axis and the origin, the concept of the absolute value of rational numbers is introduced, so that students can learn to find the absolute value of a number.
** 2. Teaching Focus **
Find the absolute value of a number.
** 3. Key to Teaching **
The significance of the absolute value on the number axis.
** 4. Teaching process **
1. ** Teaching Introduction **
- In a game in PE class, four students stood on a circle and competed to see who could reach the center of the circle first. Ask the students whether the distance between the four students to the center is equal and whether the direction affects the length of the distance. Guide the students to come to the conclusion that the distance is equal regardless of the direction.
- Citing example 2: Ask the students to find which points on the number axis have the same distance from the origin, such as the distance between 1 and-1 to the origin, so as to introduce the concept of absolute value.
2. ** Concepts and examples **
- ** Concept explanation **: The distance between the point on the number axis that represents the number 'a' and the origin is called the absolute value of the number 'a' and is recorded as 'a' vert'. For example, the absolute value of 6 on the number axis is 6, and the absolute value of 100 is 100.
- ** Practice *
- Try to answer the absolute value of simple numbers, such as < x> = 2>,< x>= 2>, x>= pm2>, y>= 5>, , x>= pm2>, y>=-5>.
- For the problem of finding the value of the algebraic expression, if the absolute value of m is 2, and m and n are the opposite of each other, c and d are the reciprocals of each other, and the absolute value of m is 2. According to the conditions, we first get the values of m= pm2 and c = 1, then we substitute them into the calculation.
** 5. Inadequacies in teaching reflection **
1. ** Students 'level difference is not enough **
- In the teaching process, due to the different levels of students, students could basically find a variety of solutions to an equation that only contained one absolute value. However, for a situation with two absolute values, most students had no way to start. In the future, he should pay attention to the design of teaching grades, reduce the span, and be closer to the students 'learning ability.
2. ** The teaching of the geometric meaning of absolute value needs to be strengthened **
- In teaching, we should further strengthen the teaching of the geometric meaning of absolute value and improve the students 'ability to combine numbers and shapes. This will help students better understand the concept of absolute value and solve more complicated problems related to absolute value.
3. ** Practice level settings can be optimized **
- In the practice segment, although the requirements were divided into two levels, they could be further optimized. For example, for students with weaker foundations, they could add more simple practice questions directly related to the concept of absolute value to help them master the basic knowledge. For students who had the ability to learn, they could add some expansive questions that required comprehensive application of knowledge to better meet the needs of students at different levels.
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" Wild Huntress " literally meant that female hunters had wild characteristics. According to the examples in the reference materials," wild " was reflected in the bravery, tenacity, and risk-taking traits that female hunters displayed during hunting or contact with wild animals. For example, in order to photograph wild animals, Gu Ying often went deep into extremely dangerous environments. When she was filming emperor penguins in the depths of the Antarctic continent near 78° south latitude, she caught up with the outbreak of the El Nino phenomenon. She still dragged dozens of kilograms of equipment to and fro four miles a day in continuous snowstorms, shooting for more than ten hours and holding on for 18 days. She filmed polar bears near the Arctic Circle at minus 40 degrees Celsius for nearly a month. She was almost killed by a brown bear attack while filming Tibetan antelopes in Hoh Xil. Her unyielding behavior of going deep into danger to film wild animals showed a wild quality. Another example was the savage girl in the story. After she was captured by the hunter, she showed extremely fierce behavior, such as swallowing a man's finger. To a certain extent, she also showed a kind of wildness. There was also the Mongolia falcon-training huntress, Ai Xiaopan. As a woman, she participated in the competition in falcon-training, which was usually dominated by men. In the face of strange gazes and provocations from others, she calmly and confidently cooperated with the golden eagle to participate in the competition. Her behavior in the male dominated field could also be seen as wild.
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The following is an example of a first-year reflection on the first volume of the book: " Reflection on 'Sitting as soon as you enter the classroom and studying as soon as you enter the school' In the study life of the first year,"sitting in the classroom and reading when you enter the school" is an important habit that we need to cultivate. Through this period of learning experience, I have a lot of insights and reflections. 1. Entering the hall and sitting down 1. merit After entering the classroom, I was able to quickly find my seat most of the time. This was because I had begun to familiarize myself with the classroom environment and my seat position. Under the teacher's guidance, I knew the importance of following the classroom order. The act of sitting in time helped to quickly quiet the classroom and create a good start to learning. 2. insufficient However, I also have some problems. Sometimes, I would be attracted by interesting things outside the classroom, such as the activities of other classes or the sounds coming from the field, so I couldn't immediately focus on my seat after entering the classroom. Sometimes, she would chat with her friends in the aisle and delay her time to sit down. This would not only affect his own learning state, but it might also interfere with other students 'learning atmosphere as soon as possible. 3. improvement measure In the future, I will be stricter with myself. I will adjust my mentality when I walk to the classroom and not pay attention to things that have nothing to do with my studies. He could also set a small goal for himself. Every time he entered the classroom, he had to be faster and quieter than the last time. At the same time, if there are friends chatting or playing around, I have to remind them to sit down as soon as possible. Second, enrollment 1. merit When I started learning, I was able to actively participate in reading activities. I like to open the textbook, look at the interesting pictures and words on it, and read with the teacher or students. Reading allowed me to learn a lot of new knowledge, such as understanding simple Chinese characters, numbers, and some interesting stories. This made me feel that learning is a very interesting thing. 2. insufficient However, I also have my shortcomings. When I was studying, I was sometimes distracted. Perhaps it was because a small picture in the textbook was particularly attractive to me, I would stare at the picture and forget to continue reading. Sometimes, the slightest movement from my classmates would make me stop reading and pay attention to what they were doing. This caused me to be unable to complete the task of reading well, nor could I fully absorb the knowledge in the book. 3. improvement measure In order to better achieve the goal of "ready-to-study", I intend to focus more on the content of the book. If I was attracted by the picture, I could first read a paragraph of content carefully before looking at the picture carefully and thinking about the connection between the picture and the words. I have to learn to restrain myself and focus on my studies. If you hear voices around you, you can silently remind yourself that I'm reading, don't be distracted. Through the reflection of " sitting in class and studying in school ", I know that I have good areas that need to be maintained and shortcomings that need to be improved. I hope that I can better develop these two good habits in my next life and become an excellent first-year student. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
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Some of the lyrics in Little Joker's " It Turns Out " were more touching, such as " If you can't keep her, let her go. The ending of the story may not be perfect. Maybe it's like you said, we're not compatible enough." They expressed the helplessness and freedom of losing love." That white T-shirt with lipstick stains, the lingering smell still doesn't want to wash away." The lyrics conveyed the unforgettable feelings of the past. In " Good Night," the lyrics," So baby have a good night, sleep quietly, So baby have a good night, smile mesmerizing, So baby have a good night " were spoken in a light tone, reflecting a unique gentleness. These lyrics all showed the little devil's talent in composing lyrics to a certain extent, expressing a variety of emotions through different lyrics. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>